A.persistence
B.pulse repetition rate
C.pulse length
D.resolution
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A.Relative
B.TRUE
C.Compass
D.Magnetic
A.magnetism from the earth's magnetic field
B.misalignment of the compass
C.magnetism within the vessel
D.a dirty compass housing
A.deviation minus variation
B.variation plus compass course
C.combined variation and deviation
D.difference between true and magnetic heading
A.vessel's geographic position
B.vessel's heading
C.earth's magnetic field
D.influence of the magnetic materials of the vessel
A.true meridian and the axis of the compass card
B.true meridian and the magnetic meridian
C.magnetic meridian and the axis of the compass card
D.axis of the compass card and the degaussing meridian
最新試題
An ECDIS is required to display which information?（）
An electronic depth finder operates on the principle that（）.
Deviation is the angle between the（）.
（）20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions are possible.
A radar contact will remain stationary on a relative motion radar display only when it is（）.
An ECDIS is required to display which information?（）
A radar range to a small，charted object such as a light will provide a line of position in which form?（）.
A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.
The radar component that generates the radio-frequency energy in the form of short powerful pulses is which of the following?（）.
Deviation in a compass is caused by the（）.